SENSITIVITY ANALYSIS OF COAL GASIFICATION IN TWO-STAGE ENTRAINED-FLOW GASIFIER: SYNGAS AND CARBON CONVERSION PREDICTION

J. FUKAİ

doi:https://doi.org/10.18186/journal-of-thermal-engineering.353727

Makale detayları

SENSITIVITY ANALYSIS OF COAL GASIFICATION IN TWO-STAGE ENTRAINED-FLOW GASIFIER: SYNGAS AND CARBON CONVERSION PREDICTION

Yazarlar:

J. FUKAİ

Yayıncı:

Yildiz Technical University

Dergi:

Journal of Thermal Engineering 2017 Vol.3 Issue 6, pp.1574-1587

Belge Tipi:

Makale

Yayın Tarihi:

10/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000506327

Sıklık:

İki Aylık

eISSN:

2148-7847

DOI:

https://doi.org/10.18186/journal-of-thermal-engineering.353727

Özet:

 


The energy production from coal-fired power plant is increasing day
by day, which result in increased CO2 emission from the existing
power plant. However, CO2 emission from coal gasification can be
reduced if an efficient CO2/O2/N2 coal
gasification is implemented in IGCC system. Numerical simulations of coal
gasification under CO2/O2/N2 gasification
condition are carried out with the aim of describing the effects of model parameters, char reaction rates,
operating conditions and heat losses to increase the syngas heating value and
carbon conversion in a two stage entrained flow coal gasification process. The Eulerian–Lagrangian approach is
applied to solve the Navier–Stokes equation and the particle dynamics. Finite
rate/eddy dissipation model is used to calculate the rate of nine homogeneous
gas-to-gas phase reactions. While only finite rate is used for the
heterogeneous solid-to-gas phase reactions. It is found
that the carbon conversions of combustor coal lie in the ranges from 97 wt% to
99 wt% for most of the calculated conditions. On the other hand, the carbon
conversion of reductor coals varies from 45 wt% to 57 wt%. A noticeable change
is obtained when the gasification occurs under a high-temperature condition.
Remarkable outlet results of about 32 wt% CO, 0.58 wt% H2 and 89 wt%
overall carbon conversion are predicted if a high temperature of 1673K is
maintained in the reductor. On the other hand, a reduced soot concentration is
predicted if the O2 concentration and/or the reductor gas
temperature increase(s) in the gasifier.

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Makale detayları

SENSITIVITY ANALYSIS OF COAL GASIFICATION IN TWO-STAGE ENTRAINED-FLOW GASIFIER: SYNGAS AND CARBON CONVERSION PREDICTION

Yazarlar: J. FUKAİ

Yayıncı: Yildiz Technical University

Dergi: Journal of Thermal Engineering 2017 Vol.3 Issue 6, pp.1574-1587

Belge Tipi: Makale

Yayın Tarihi: 10/2017

Belge Dili: Türkçe

Document ID (Org No.): 2000506327

Sıklık: İki Aylık

eISSN: 2148-7847

DOI: https://doi.org/10.18186/journal-of-thermal-engineering.353727

Sayı

Yazarlar:

J. FUKAİ

Yayıncı:

Yildiz Technical University

Dergi:

Journal of Thermal Engineering 2017 Vol.3 Issue 6, pp.1574-1587

Belge Tipi:

Makale

Yayın Tarihi:

10/2017

Belge Dili:

Türkçe

Document ID (Org No.):

2000506327

Sıklık:

İki Aylık

eISSN:

2148-7847

DOI:

https://doi.org/10.18186/journal-of-thermal-engineering.353727